FIX: backend models to node have N:M families relationship
ADD: ember family/node habtm relation, use multiple select and persist relations
ADD: load node's families when the node is edited
FIX: add node when families are selected
FIX: node family coloring
ADD: chosen plugin to the node families selector
ADD: commented chosen plugin and add instructions for selecting multiple families
FIX: access to node_ids, family_ids and role_ids attrs in social_network
FIX: delete nodes
FIX: focus on input when creating nodes
FIX: display color when creating new families
FIX: sort families by kind and then by name
FIX: some family visualization issues
FIX: families selector help as a tooltip
FIX: seed as DCC social network
FIX: add dependent destroy to social_network's has many relations
ADD: render multiple families
FIX: actorFamilies recomputed when families changed
Merge branch 'multiple_families' into mauros_snm